Antivibration device for vehicles.



E: V. HARTFORD.

ANTIVIBBAIION DEWCE FOR VEHECLES=- APPLICATIGN man 061130, 1909.

Patemed Dan. 18, 1912 following is a-full, clear, and exact speci-' zaalltwhom it. mag concern: .icBc'zit known that I, EDWARD V. HART-ronmfia :citizen of the United States, residingat'Deal, in the county.of Monmouthand the-State of New Jersey, have invented certain new anduseful Improvements in Antivibration Devices for Vehicles, ofv whicht-heficatiom; I k My invention relates to certain new and usefulimprovements in antivibration devices for vehicles, and the objecthasbeen toimprove and simplify the construction thereof and to provide asimple and efilcient device which will take care of, and. prevent iinvention may be embodied in many forms,

- and and I.do not mean to limit myself to the particular one shown. Inthese drawings- Figure 1.is a side elevation of the main frictiondevice;

Fig. 2 is a top plan view thereof;

-Fig. 3. is a vertical section thereof;

Fig. i is a plan View of the annular extension of one of said arms;

Fig. 5 is a plan view of the cover-plate;

Fig. 6 is a side elevation of one of the frictionmembers.

Like reference numerals indicate corre sponding parts in the differentfigures of the drawings.

In the form illustrated, my invention consists of a primary frictiondevice consisting of two friction members 1 and 2. The frictionmember 1is provided with an arm 3, for operatingthe same, and the member 2 isadaptedto be operated by an arm 4. A friction washer 5, of wood,leather, fiber, or other suitable material, is interposed between themain friction members. The outer ends of the operating arms are adaptedto be pivotally connected to the respective parts of the vehicle betweenwhich the spring is interposed. The pivotal connections are preferablyfrictionally-retarded and are not here shown, as their construction maybe the usual form of such devices well known in the art.

In my preferred form, friction member 1. consists of a circular plateformed integral Specification of Letters Patent.

Application filed Qctober so, nice ent is:

an operating arm connec rear orr on EDWARD v. nan'rroan, or neat, newJERSEY.

ANTIVIBBATION DEVICE FQR VEHICLES. V

eerial He. 525,480.

with the arm 3, as shown, and friction,

.Patented 18,

her 2 consists of a disk having a main operating face 6, and annularextensions 7".aiid S oi areduced radius, upon the backthereof. A centralaperture 9 is also provided in. id

member, and similar apertures are. likew se provided in the frictionwasherfo andf r ic tron member 1 and through these perfora-- tionspasses a bolt 10,,havinga head 11, which head carries positioning pins12..,. A'n

apertured spider-spring13 also fits upon the bolt. The prongs lat-ofwhich spider spring bear upon the outer face of friction member 1. A-nut15' 1s provided on said bolt, by means of which the friction members arebrought into e'forcible contact and Y the pressure therebetweenregulatedtqthe desired extent. The arm 4 has formed/ integral therewith,upon one end thereof, an annular portion 16. Slots 1? are located uponopposite sides of said annular portion. The center of said portion isout away-sufficiently to permit it to fit snugly over the projection 7on the friction member 2. Pins 18 pass freely through said slots 17 andare held securely in recesses 19 in said member 2 and a erture 20 n 3011the coverlate 21.

i P ll hen the ClGYlCQ is assembled as shown in Fig. 3, its operationwill be readily understood. The friction members 1 and 2 are" pressedfirmly together bymeans of the bolt, cooperating nut and spider-spring.The arm 3-being rigidlyconnected to the member 1, communicates movementto said memher. When the arm 1 is moved slightly, however, it merelycommunicates movement to the-annularextension 16, which is, however,retarded by friction between it and the adjacent faces of the frictionmember 2 and the plate 21. This slight independent movement, however, isonly co-extensive with the length of the slot 17, and any movementbeyond causes the pin 18 to contact with one end of said slot and thus afurther movement of the arm at brings about a move; I

ment of the member 2 with respect'to memher 1.

It is obvious that many modifications and changes may be made in myinvention without departing from the spipit thereof, and I do not meanto limit myse to the particular form shown and described, but what Iclaim and desire to secure by Letters Patiction member, thereto, asec- 1. The combination ofa 0nd friction member comprising a disk havinga friction face cooperative frictionally with the first friction member,and an annular extension of less radius on its rear face and a secondannular extension of less vradius than the first extension carriedrearwardly thereof, an operating arm for the second friction memberprovided with an annular portion having its face in frictionalengagement with the rear face of the said disk and embracing the firstannular extension and being of greater thickness than Elie thickness ofthe said first extension, an annular plate embracing the second annularextension and having a friction face overlying the annular portion ofthe second arm, connecting means between the second arm and the disk andannular plate for permitting a limited movement of such arm in respectof the second friction member, and means for bringing the frictionfacesinto frictional relation.

2. A shock absorber comprising a friction member having an operating armformed integrally therewith, a second friction member cooperating withsaid first member, said second member comprising a disk having a mainoperating surface and annular extensions of reduced diameters upon theback thereof, a friction washer interposed between the active surfacesof said friction members, a detachable operating armfor said secondfriction memher, said arm terminating in an annular apertured portion atone end thereof adapted to contact with a corresponding and a spiderspring and nut on said bolt for regulating the pressure between saidmembers.

In witness whereof I have hereunto set my hand in .the presence of twosubscribing witnesses;

' EDWARD V. HARTFORD. \Vitnesses:

C. K. POLLITZER,

ADoLPH F. DINSE.

